"Identical twins" is not a description of the twins character, specific physical features, behaviour, nurturing. Instead, 'identical twins' is a noun-phrase mea

"Identical twins" is not a description of the twins character, specific physical features, behaviour, nurturing. Instead, 'identical twins' is a noun-phrase meaning two children from a single zygote, ie 'monozygotic'. It does not mean "twins who are literally identical"; though you could think of it as twins who are genetically indistinct. I'm a physicist with no biology qualifications, but it just sounded to me like you may have misunderstood the linguistic meaning. Apologies if I was wrong about that.